A Server-Side Template Injection (SSTI) was discovered in Form.io 2.0.0.
Priority MEDIUM 53CWE-74Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and GitHub.
Summary
A Server-Side Template Injection (SSTI) was discovered in Form.io 2.0.0. This leads to Remote Code Execution during deletion of the default Email template URL. NOTE: the email templating service was removed after 2020. Additionally, the vendor disputes this issue indicating this is sandboxed and only executable by admins.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.02436 84th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | formio (npm) | up to 2.0.0 | — | No fix listed | GHSA-52vj-mr2j-f8jh |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- formio (npm) Vendor— Affected up to 2.0.0 Fixed in — No fix listed GHSA-52vj-mr2j-f8jh
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-28246
- 2026-10-03 Alias added: GHSA-52vj-mr2j-f8jh
References
Sources
- CVE-2020-28246 · CVE Program
- CVE-2020-28246 · NVD
- FIRST EPSS
- GHSA-52vj-mr2j-f8jh · GitHub Advisory Database · CC BY 4.0
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